How to make forms secure?

Do I need to manually check something off? Or are they security enabled automatically??

In order for you to make sure your form is secure, do as follows:

1 - From the form builder, open your form in edit mode, click on Embed Form, the Embed Form Wizard screen will pop up, check on Secure Form, click on Close button when done:

Please take a look at this guide: http://www.jotform.com/help/63-How-can-I-receive-SSL-Submissions that will help you with the subject.

Let us know if we can further assist you.